package com.yiruantong.common.idempotent.aspectj;

import cn.dev33.satoken.SaManager;
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.crypto.SecureUtil;
import com.yiruantong.common.core.constant.GlobalConstants;
import com.yiruantong.common.core.domain.R;
import com.yiruantong.common.core.exception.ServiceException;
import com.yiruantong.common.core.utils.MessageUtils;
import com.yiruantong.common.core.utils.ServletUtils;
import com.yiruantong.common.core.utils.StringUtils;
import com.yiruantong.common.idempotent.annotation.RepeatSubmit;
import com.yiruantong.common.json.utils.JsonUtils;
import com.yiruantong.common.redis.utils.RedisUtils;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.validation.BindingResult;
import org.springframework.web.multipart.MultipartFile;

import java.time.Duration;
import java.util.Collection;
import java.util.Map;
import java.util.StringJoiner;

/**
 * 防止重复提交(参考美团GTIS防重系统)
 *
 * @author YiRuanTong
 */
@Aspect
public class RepeatSubmitAspect {

  private static final ThreadLocal<String> KEY_CACHE = new ThreadLocal<>();

  @Before("@annotation(repeatSubmit)")
  public void doBefore(JoinPoint point, RepeatSubmit repeatSubmit) throws Throwable {
    // 如果注解不为0 则使用注解数值
    long interval = repeatSubmit.timeUnit().toMillis(repeatSubmit.interval());

    if (interval < 1000) {
      throw new ServiceException("重复提交间隔时间不能小于'1'秒");
    }
    HttpServletRequest request = ServletUtils.getRequest();
    String nowParams = argsArrayToString(point.getArgs());

    // 请求地址（作为存放cache的key值）
    String url = request.getRequestURI();

    // 唯一值（没有消息头则使用请求地址）
    String submitKey = StringUtils.trimToEmpty(request.getHeader(SaManager.getConfig().getTokenName()));

    submitKey = SecureUtil.md5(submitKey + ":" + nowParams);
    // 唯一标识（指定key + url + 消息头）
    String cacheRepeatKey = GlobalConstants.REPEAT_SUBMIT_KEY + url + submitKey;
    if (RedisUtils.setObjectIfAbsent(cacheRepeatKey, "", Duration.ofMillis(interval))) {
      KEY_CACHE.set(cacheRepeatKey);
    } else {
      String message = repeatSubmit.message();
      if (StringUtils.startsWith(message, "{") && StringUtils.endsWith(message, "}")) {
        message = MessageUtils.message(StringUtils.substring(message, 1, message.length() - 1));
      }
      throw new ServiceException(message);
    }
  }

  /**
   * 处理完请求后执行
   *
   * @param joinPoint 切点
   */
  @AfterReturning(pointcut = "@annotation(repeatSubmit)", returning = "jsonResult")
  public void doAfterReturning(JoinPoint joinPoint, RepeatSubmit repeatSubmit, Object jsonResult) {
    if (jsonResult instanceof R<?> r) {
      try {
        // 成功则不删除redis数据 保证在有效时间内无法重复提交
        if (r.getCode() == R.SUCCESS) {
          return;
        }
        RedisUtils.deleteObject(KEY_CACHE.get());
      } finally {
        KEY_CACHE.remove();
      }
    }
  }

  /**
   * 拦截异常操作
   *
   * @param joinPoint 切点
   * @param e         异常
   */
  @AfterThrowing(value = "@annotation(repeatSubmit)", throwing = "e")
  public void doAfterThrowing(JoinPoint joinPoint, RepeatSubmit repeatSubmit, Exception e) {
    RedisUtils.deleteObject(KEY_CACHE.get());
    KEY_CACHE.remove();
  }

  /**
   * 参数拼装
   */
  private String argsArrayToString(Object[] paramsArray) {
    StringJoiner params = new StringJoiner(" ");
    if (ArrayUtil.isEmpty(paramsArray)) {
      return params.toString();
    }
    for (Object o : paramsArray) {
      if (ObjectUtil.isNotNull(o) && !isFilterObject(o)) {
        params.add(JsonUtils.toJsonString(o));
      }
    }
    return params.toString();
  }

  /**
   * 判断是否需要过滤的对象。
   *
   * @param o 对象信息。
   * @return 如果是需要过滤的对象，则返回true；否则返回false。
   */
  @SuppressWarnings("rawtypes")
  public boolean isFilterObject(final Object o) {
    Class<?> clazz = o.getClass();
    if (clazz.isArray()) {
      return clazz.getComponentType().isAssignableFrom(MultipartFile.class);
    } else if (Collection.class.isAssignableFrom(clazz)) {
      Collection collection = (Collection) o;
      for (Object value : collection) {
        return value instanceof MultipartFile;
      }
    } else if (Map.class.isAssignableFrom(clazz)) {
      Map map = (Map) o;
      for (Object value : map.values()) {
        return value instanceof MultipartFile;
      }
    }
    return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse
      || o instanceof BindingResult;
  }

}
